org.apache.hadoop.fs

Interface CanSetReadahead

All Known Implementing Classes:

FSDataInputStream, HdfsDataInputStream

@InterfaceAudience.Public
 @InterfaceStability.Evolving
public interface CanSetReadahead

Method Summary

Modifier and Type	Method and Description
void	setReadahead(Long readahead) Set the readahead on this stream.

Method Detail

setReadahead

void setReadahead(Long readahead)
           throws IOException,
                  UnsupportedOperationException

Set the readahead on this stream.

Parameters:

readahead - The readahead to use. null means to use the default.

Throws:

IOException - If there was an error changing the dropBehind setting. UnsupportedOperationException If this stream doesn't support setting readahead.

UnsupportedOperationException